听下面一段独白，回答以下小题。
【小题1】Who is the speaker most probably talking to?

A．Dieters.

B．Sports enthusiasts.

C．Market watchers.

【小题2】Why does the speaker take Trevor Hofbauer for example?

A．To state that wearing fitness trackers helps.

B．To prove that running watch-free is beneficial.

C．To clarify that fitness trackers are popular.

【小题3】What does the speaker recommend at the end of her talk?

A．Stopping wearing fitness trackers.

B．Analyzing data from fitness trackers.

C．Reducing reliance on fitness trackers.

【小题4】What does the speaker mainly talk about?

A．The popularity of fitness trackers.

B．The disadvantages of fitness trackers.

C．The development of fitness trackers.